Agent safety startup Raindrop raises to $50M total, launches Simulations to catch failures pre-production
ycombinator · x · 2026-09-18
Raindrop builds a safety layer for AI agents, detecting production failures from failed tool calls and hallucinations to problems companies didn't know to look for. Used by Vercel, Clay, Framer, and Speak, it just raised a Series A to $50M total funding and launched Raindrop Simulations, moving detection earlier into development. Founders share how a tool built to debug their own coding agent became the company — and why better agents create more ways to go wrong.
Related event: Agent security startup Raindrop raises $50M Series A, launches Simulations(8 posts)→
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